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New Evidence on the Timing and Spacing of Births
Abstract
This is a progress report on an ongoing empirical study of the determinants of life
cycle fertility. "The main objective of the early stage of [the] work is to codify
the 'facts' in a coherent statistical framework that provides the duration data analogue
of the conventional simultaneous equations model." After reviewing the relevant literature,
the authors present an empirical analysis of data on fertility, marital status, and
work histories for 570 Swedish women born between 1941 and 1945. The data are from
a survey conducted by the Swedish Central Bureau of Statistics in 1981
Type
Journal articleSubject
Birth intervalsBirth spacing
Employment status
Family life cycle
Fertility determinants
Labor force
Marital status
Sweden
Time factors
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V. Joseph Hotz
Arts and Sciences Distinguished Professor of Economics
Professor Hotz specializes in the subjects of applied econometrics, labor economics,
economic demography, and economics of the family. His studies have investigated the
impacts of social programs, such as welfare-to-work training; the relationship between
childbearing patterns and labor force participation of U.S. women; the effects of
teenage pregnancy; the child care market; the Earned Income Tax Credit; and other
such subjects. He began conducting his studies in 1977, and has since publishe

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